Hello. I've had the same message/error today. It seems, that the "plugin-container" profile was responsible (which, I created today). But, there was not any entries in the log files such as `/var/log/kern.log` or `/var/log/syslog`. Everything was OK: for example putting profile in the "enforce" mode etc. Message has shown after enabling Firefox (by clicking on an icon).
So, I decided to remove the "plugin-container" profile, reload AppArmor and Firefox profile (because there must be added one rule related to plugin) and everything started to work normally. I have e10s enabled, a couple of plugins installed etc. I've never saw such error. Firefox ver.: 50.1.0 Flash ver.: 24.0.0.194ubuntu0.12.04.1 Best regards. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/1602910 Title: firefox-trunk: Bad news first: This tab has crashed Now for the good news: You can just close this tab, restore it or restore all your crashed tabs. Status in firefox package in Ubuntu: New Bug description: Using firefox-trunk on: Distributor ID: Ubuntu Description: Ubuntu 14.04.4 LTS Release: 14.04 Codename: trusty The firefox is not usable, on any URL I get: Bad news first: This tab has crashed Now for the good news: You can just close this tab, restore it or restore all your crashed tabs. This is the stack trace: |⇒ firefox-trunk (firefox-trunk:12761): GLib-GObject-CRITICAL **: g_object_unref: assertion 'object->ref_count > 0' failed (firefox-trunk:12761): GLib-GObject-CRITICAL **: g_object_unref: assertion 'object->ref_count > 0' failed Sandbox: seccomp sandbox violation: pid 12870, syscall 56, args 18874385 0 0 140336228863376 12870 140336228862656. Killing process. Sandbox: crash reporter is disabled (or failed); trying stack trace: Sandbox: frame #01: __libc_fork[/lib/x86_64-linux-gnu/libc.so.6 +0xc0ee4] Sandbox: frame #02: ???[/lib/x86_64-linux-gnu/libglib-2.0.so.0 +0x8c54c] Sandbox: frame #03: g_spawn_sync[/lib/x86_64-linux-gnu/libglib-2.0.so.0 +0x8ce18] Sandbox: frame #04: g_spawn_command_line_sync[/lib/x86_64-linux-gnu/libglib-2.0.so.0 +0x8d517] Sandbox: frame #05: _ZNK6Oxygen10QtSettings10runCommandERKSsRPc[/usr/lib/x86_64-linux-gnu/gtk-3.0/3.0.0/theming-engines/liboxygen-gtk.so +0x9a749] Sandbox: frame #06: _ZNK6Oxygen10QtSettings17kdeConfigPathListEv[/usr/lib/x86_64-linux-gnu/gtk-3.0/3.0.0/theming-engines/liboxygen-gtk.so +0x9d050] Sandbox: frame #07: _ZN6Oxygen10QtSettings10initializeEj[/usr/lib/x86_64-linux-gnu/gtk-3.0/3.0.0/theming-engines/liboxygen-gtk.so +0xaa0f7] Sandbox: frame #08: _ZN6Oxygen5Style10initializeEj[/usr/lib/x86_64-linux-gnu/gtk-3.0/3.0.0/theming-engines/liboxygen-gtk.so +0xc58b0] Sandbox: frame #09: _ZN6Oxygen5Style8instanceEv[/usr/lib/x86_64-linux-gnu/gtk-3.0/3.0.0/theming-engines/liboxygen-gtk.so +0xc5cf5] Sandbox: frame #10: _ZN6Oxygen13ThemingEngine12instanceInitEP19OxygenThemingEngine[/usr/lib/x86_64-linux-gnu/gtk-3.0/3.0.0/theming-engines/liboxygen-gtk.so +0xf1559] Sandbox: frame #11: g_type_create_instance[/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 +0x30e3b] Sandbox: frame #12: ???[/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 +0x15355] Sandbox: frame #13: g_object_newv[/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 +0x1710d] Sandbox: frame #14: g_object_new[/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 +0x178bc] Sandbox: frame #15: create_engine[/usr/lib/x86_64-linux-gnu/gtk-3.0/3.0.0/theming-engines/liboxygen-gtk.so +0xf0f0a] Sandbox: frame #16: gtk_theming_engine_load[/usr/lib/x86_64-linux-gnu/libgtk-3.so.0 +0x27a385] Sandbox: frame #17: ???[/usr/lib/x86_64-linux-gnu/libgtk-3.so.0 +0x1165de] Sandbox: frame #18: ???[/usr/lib/x86_64-linux-gnu/libgtk-3.so.0 +0x121188] Sandbox: frame #19: gtk_css_provider_load_from_file[/usr/lib/x86_64-linux-gnu/libgtk-3.so.0 +0x1221ea] Sandbox: frame #20: gtk_css_provider_load_from_path[/usr/lib/x86_64-linux-gnu/libgtk-3.so.0 +0x122276] Sandbox: frame #21: ???[/usr/lib/x86_64-linux-gnu/libgtk-3.so.0 +0x122525] Sandbox: frame #22: ???[/usr/lib/x86_64-linux-gnu/libgtk-3.so.0 +0x21b7af] Sandbox: frame #23: gtk_settings_get_for_screen[/usr/lib/x86_64-linux-gnu/libgtk-3.so.0 +0x21bb6f] Sandbox: frame #24: ???[/usr/lib/firefox-trunk/libxul.so +0x1f1deaa] Sandbox: frame #25: ???[/usr/lib/firefox-trunk/libxul.so +0x1ef608e] Sandbox: frame #26: ???[/usr/lib/firefox-trunk/libxul.so +0x1ef768f] Sandbox: frame #27: ???[/usr/lib/firefox-trunk/libxul.so +0x2384c78] Sandbox: frame #28: ???[/usr/lib/firefox-trunk/libxul.so +0x1d9da09] Sandbox: frame #29: ???[/usr/lib/firefox-trunk/libxul.so +0x1d9fd06] Sandbox: frame #30: ???[/usr/lib/firefox-trunk/libxul.so +0x1d9fda8] Sandbox: frame #31: ???[/usr/lib/firefox-trunk/libxul.so +0xf245f6] Sandbox: frame #32: ???[/usr/lib/firefox-trunk/libxul.so +0xd38aa1] Sandbox: frame #33: ???[/usr/lib/firefox-trunk/libxul.so +0xd40cae] Sandbox: frame #34: ???[/usr/lib/firefox-trunk/libxul.so +0xd42d88] Sandbox: frame #35: ???[/usr/lib/firefox-trunk/libxul.so +0xd34edb] Sandbox: frame #36: ???[/usr/lib/firefox-trunk/libxul.so +0xd33d9f] Sandbox: frame #37: ???[/usr/lib/firefox-trunk/libxul.so +0xa59dc7] Sandbox: frame #38: ???[/usr/lib/firefox-trunk/libxul.so +0xa74466] Sandbox: frame #39: ???[/usr/lib/firefox-trunk/libxul.so +0xd35126] Sandbox: frame #40: ???[/usr/lib/firefox-trunk/libxul.so +0xd1fd34] Sandbox: frame #41: ???[/usr/lib/firefox-trunk/libxul.so +0x1eea51f] Sandbox: frame #42: XRE_RunAppShell[/usr/lib/firefox-trunk/libxul.so +0x254a411] Sandbox: frame #43: ???[/usr/lib/firefox-trunk/libxul.so +0xd1fd34] Sandbox: frame #44: XRE_InitChildProcess[/usr/lib/firefox-trunk/libxul.so +0x254abc1] Sandbox: frame #45: ???[/usr/lib/firefox-trunk/plugin-container +0x992d] Sandbox: frame #46: __libc_start_main[/lib/x86_64-linux-gnu/libc.so.6 +0x21f45] Sandbox: frame #47: ???[/usr/lib/firefox-trunk/plugin-container +0x9334] Sandbox: frame #48: ??? (???:???) Sandbox: end of stack. [Parent 12761] WARNING: pipe error (70): Connection reset by peer: file /build/firefox-trunk-QbUdjK/firefox-trunk-50.0~a1~hg20160709r304329/ipc/chromium/src/chrome/common/ipc_channel_posix.cc, line 320 ###!!! [Parent][MessageChannel] Error: (msgtype=0x2C007D,name=PBrowser::Msg_Destroy) Channel error: cannot send/recv To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1602910/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
